What role does dynamic vapor adsorption technology play in the field of biomass material research?

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What role does dynamic vapor adsorption technology play in the field of biomass material research? Biomass materials tend to absorb water due to their chemical properties; as a result, they contain large amounts of water. They are also prone to absorbing moisture from the environment, so either too low or too high humidity is detrimental to their performance. Proteins become inactivated at low humidity, whereas the mechanical properties of biological polymers decrease significantly at high humidity. 1) Drying: For many solid materials such as wood, bran, straw, leather, etc., water absorption is a key parameter for characterizing their drying properties and durability. The DVS method invented by SMS over the past 10 years has become a standard laboratory method for studying drying and dehydration behavior. 2) Particle adhesion is a rather challenging issue for many applications in biological and natural materials. A key factor in testing adhesion is the surface energy of the material; however, the fibrous, granular, or membrane form of such materials poses challenges to this testing. 3) Glass transition temperature: All amorphous materials have a glass transition temperature, and for hydrophilic materials, this temperature is highly sensitive to the water content in the material. The DVS apparatus is highly effective in studying the glass transition temperature of amorphous solids. 4) Water vapor diffusion and permeability: Biomass materials often contain a large amount of water in their initial state. Therefore, understanding the diffusion and permeability of water in these materials is key to understanding their chemical and morphological structure as well as their properties. The DVS instrument is an ideal choice for obtaining kinetic and equilibrium information on diffusion and permeability in biological and natural materials. 5) Water adsorption isotherms: Understanding the water adsorption properties of biomass materials is key to knowing their performance and applications. The DVS method invented by SMS over the past 20 years has become the standard experimental technique for testing water adsorption isotherms, and it is described in the pharmacopoeias of the United States and the European Union. 6) Specific surface area: Advanced DVS technology can be used to test the adsorption and desorption of biomass materials in water and other organic solvents. The specific surface area of the biomass sample at temperatures above 77 K can be determined, and this depends on the adsorption vapor used, as well as whether the temperature is higher, lower, or close to room temperature. 7) Use in combination with other instruments: DVS can be used together with Raman, FTIR, and XRD techniques to reveal more information about the properties of materials.